Bath tub



FIG. 1 is a perspective view taken from the top, one side and one end of a bath tub showing my new design;

FIG. 2 is a perspective view taken from the top and the side and end opposite those shown in FIG. 1;

FIG. 3 is an elevational view taken from the side shown in FIG. 2 the opposite side being a mirror image of the side shown;

FIG. 4 is an elevational view taken from the end shown in FIG. 2; and

FIG. 5 is a perspective view taken from the bottom and the side and end shown in FIG. 1. 

The ornamental design for a bath tub, as shown and described. 